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/*
* Copyright (C) 2013 Square, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.squareup.picasso;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.NetworkInfo;
import java.io.IOException;
import java.io.InputStream;
import static com.squareup.picasso.Downloader.Response;
import static com.squareup.picasso.Picasso.LoadedFrom.DISK;
import static com.squareup.picasso.Picasso.LoadedFrom.NETWORK;
class NetworkBitmapHunter extends BitmapHunter {
static final int DEFAULT_RETRY_COUNT = 2;
private static final int MARKER = 65536;
private final Downloader downloader;
int retryCount;
public NetworkBitmapHunter(Picasso picasso, Dispatcher dispatcher, Cache cache, Stats stats,
Action action, Downloader downloader) {
super(picasso, dispatcher, cache, stats, action);
this.downloader = downloader;
this.retryCount = DEFAULT_RETRY_COUNT;
}
@Override Bitmap decode(Request data) throws IOException {
boolean loadFromLocalCacheOnly = retryCount == 0;
Response response = downloader.load(data.uri, loadFromLocalCacheOnly);
if (response == null) {
return null;
}
loadedFrom = response.cached ? DISK : NETWORK;
Bitmap result = response.getBitmap();
if (result != null) {
return result;
}
InputStream is = response.getInputStream();
if (is == null) {
return null;
}
// Sometimes response content length is zero when requests are being replayed. Haven't found
// root cause to this but retrying the request seems safe to do so.
if (response.getContentLength() == 0) {
Utils.closeQuietly(is);
throw new IOException("Received response with 0 content-length header.");
}
if (loadedFrom == NETWORK && response.getContentLength() > 0) {
stats.dispatchDownloadFinished(response.getContentLength());
}
try {
return decodeStream(is, data);
} finally {
Utils.closeQuietly(is);
}
}
@Override boolean shouldRetry(boolean airplaneMode, NetworkInfo info) {
boolean hasRetries = retryCount > 0;
if (!hasRetries) {
return false;
}
retryCount--;
return info == null || info.isConnected();
}
@Override boolean supportsReplay() {
return true;
}
private Bitmap decodeStream(InputStream stream, Request data) throws IOException {
MarkableInputStream markStream = new MarkableInputStream(stream);
stream = markStream;
long mark = markStream.savePosition(MARKER);
final BitmapFactory.Options options = createBitmapOptions(data);
final boolean calculateSize = requiresInSampleSize(options);
boolean isWebPFile = Utils.isWebPFile(stream);
markStream.reset(mark);
// When decode WebP network stream, BitmapFactory throw JNI Exception and make app crash.
// Decode byte array instead
if (isWebPFile) {
byte[] bytes = Utils.toByteArray(stream);
if (calculateSize) {
BitmapFactory.decodeByteArray(bytes, 0, bytes.length, options);
calculateInSampleSize(data.targetWidth, data.targetHeight, options);
}
return BitmapFactory.decodeByteArray(bytes, 0, bytes.length, options);
} else {
if (calculateSize) {
BitmapFactory.decodeStream(stream, null, options);
calculateInSampleSize(data.targetWidth, data.targetHeight, options);
markStream.reset(mark);
}
Bitmap bitmap = BitmapFactory.decodeStream(stream, null, options);
if (bitmap == null) {
// Treat null as an IO exception, we will eventually retry.
throw new IOException("Failed to decode stream.");
}
return bitmap;
}
}
}
